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Yesterday I sat on a bus and counted the people as they got on and off.

I drew a small map of the seats in my notebook, and when someone got on I made a marked that seat with a symbol of the bus stop at which they got on. When someone got off I crossed their mark off from the seat at which they were sitting, and then wrote down where they got off. I did this for one circuit along the TCAT 82 route, and then copied onto google docs.

Each link represents a passenger getting on and off the bus. Think of the links as traveling downwards; because the bus follows a linear path, a person cannot get on at at stop and then get off at a stop above it, so all these connections are arrows pointing downwards (one-way).

I tried rearranging the data to make it easier to read, with entries connecting to the right side of the boxes, and exits connecting to the left side of boxes. Frayed lines mean someone either got on the bus without me knowing where they got on, or got off without me knowing they did.

We can apply hub and authority scores to this like we did in class. Here they are after one update, and without being normalized.

Authority Score Stop Hub Score
1 Veterinary 1
1 Dairy 2
1 Brad 2
1 Kennedy 6
1 Uris 4
1 Rock 3
2 Balch 1
0 Jessup 0
2 RP 1
2 PG 0
1 A lot 0
0 A lot low 0
1 Hasb 1
1 Helen Newman 1
0 Balch higher? 0
1 Goldwin Smith 0
1 Uris 2 5
1 Bag 0
0 Dairy 2 0
0 Boyce 0
1 Veterinary 2 0
0 Hum 6
1 Mapl 0
3 End. 0

In this case, a score of zero means that nobody got on or off at this stop.

We could also apply multiple updates to make it more accurate, but for the general concept one should be enough.


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December 2019